diff options
author | Don Dugger <donald.d.dugger@intel.com> | 2015-10-29 22:15:25 +0000 |
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committer | Gerrit Code Review <gerrit@172.30.200.206> | 2015-10-29 22:15:25 +0000 |
commit | afc76d554ed517e38d46b6b182a7016406a1323f (patch) | |
tree | 06133cb33a43488837ea67667458e1582f2f40ce /kernel/arch/x86/kernel/step.c | |
parent | 41f827bfbb10e03c4d228fbcc801dd51fb9983b0 (diff) | |
parent | ec0a2ed6d8a5e555edef907895c041e285fdb495 (diff) |
Merge "These changes are a raw update to a vanilla kernel 4.1.10, with the recently announced rt patch patch-4.1.10-rt10.patch. No further changes needed."
Diffstat (limited to 'kernel/arch/x86/kernel/step.c')
-rw-r--r-- | kernel/arch/x86/kernel/step.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/kernel/arch/x86/kernel/step.c b/kernel/arch/x86/kernel/step.c index 9b4d51d0c..0ccb53a9f 100644 --- a/kernel/arch/x86/kernel/step.c +++ b/kernel/arch/x86/kernel/step.c @@ -5,6 +5,7 @@ #include <linux/mm.h> #include <linux/ptrace.h> #include <asm/desc.h> +#include <asm/mmu_context.h> unsigned long convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs) { @@ -27,13 +28,14 @@ unsigned long convert_ip_to_linear(struct task_struct *child, struct pt_regs *re struct desc_struct *desc; unsigned long base; - seg &= ~7UL; + seg >>= 3; mutex_lock(&child->mm->context.lock); - if (unlikely((seg >> 3) >= child->mm->context.size)) + if (unlikely(!child->mm->context.ldt || + seg >= child->mm->context.ldt->size)) addr = -1L; /* bogus selector, access would fault */ else { - desc = child->mm->context.ldt + seg; + desc = &child->mm->context.ldt->entries[seg]; base = get_desc_base(desc); /* 16-bit code segment? */ |